On 10/10/16 5:31 PM, Thad Guidry wrote:
Kingsley,

use shortcut syntax instead. Also look at how the many examples show doing tihngs.
http://tinyurl.com/hkv8z7m

Thad,

Not getting the point you are trying to articulate i.e., the solution isn't comprised strictly of <https://www.wikidata.org/wiki/Property:P1709> relations.

I am assuming <https://www.wikidata.org/wiki/Property:P1709> identifies equivalentClass relations i.e., <https://www.wikidata.org/wiki/Property:P1709>  owl:equivalentProperty owl:equivalentClass .

You should be able to articulate the equivalent of the following, using SPARQL against Wikidata:

SELECT DISTINCT ?s ?relation ?o
WHERE { ?s owl:equivalentClass ?o.
        BIND (owl:equivalentClass AS ?relation)
        FILTER (isIRI(?s))
        FILTER (isIRI(?o))
      }
LIMIT 100

Live Solution Link:
http://lod.openlinksw.com/sparql?default-graph-uri=&query=SELECT+DISTINCT+%3Fs+%3Frelation+%3Fo%0D%0AWHERE+%7B+%3Fs+owl%3AequivalentClass+%3Fo.%0D%0A++++++++BIND+%28owl%3AequivalentClass+AS+%3Frelation%29%0D%0A++++++++FILTER+%28isIRI%28%3Fs%29%29+%0D%0A++++++++FILTER+%28isIRI%28%3Fo%29%29%0D%0A++++++%7D%0D%0ALIMIT+100&format=text%2Fx-html%2Btr&CXML_redir_for_subjs=121&CXML_redir_for_hrefs=&timeout=30000&debug=on

Kingsley 

        

      

      

      

        
On Mon, Oct 10, 2016 at 1:50 PM Kingsley Idehen
          <kidehen@openlinksw.com>
          wrote:

        

        

          

            
On
              10/9/16 1:34 PM, Thad Guidry wrote:

            

            

              
Kingsley,
                


                

                
The mappings are already in
                  Wikidata (we still have a few properties left to map,
                  but the classes are done, except for a few in pending.schema.org.  You can
                  just query them in some fashion such as this: http://tinyurl.com/h9vjqd8

              

            

            

          

          
 Thad,

            

            Shouldn't the following query return all Classes
            participating in an <https://www.wikidata.org/wiki/Property:P1709>
            relation? :

            

            SELECT ?s ?relation ?o

            WHERE { ?s <https://www.wikidata.org/wiki/Property:P1709>
            ?o. 

                    BIND (<https://www.wikidata.org/wiki/Property:P1709>
            AS ?relation) 

                  } 

            LIMIT 100

            

            Query Link:
            https://query.wikidata.org/#%0A%0ASELECT%20%3Fs%20%3Frelation%20%3Fo%0AWHERE%20%7B%20%3Fs%20%3Chttps%3A%2F%2Fwww.wikidata.org%2Fwiki%2FProperty%3AP1709%3E%20%3Fo.%20%0A%20%20%20%20%20%20%20%20BIND%20%28%3Chttps%3A%2F%2Fwww.wikidata.org%2Fwiki%2FProperty%3AP1709%3E%20AS%20%3Frelation%29%20%0A%20%20%20%20%20%20%7D%20%0ALIMIT%20100%0A

            

            If not, can you formulate something closer to that output
            which makes matters easier should you not have an RDF dump
            available etc..

          


            

            Kingsley 

          

          
 

            

              

                
 

              

              

              

                
On Sun, Oct 9, 2016 at
                  11:09 AM Kingsley Idehen <kidehen@openlinksw.com>
                  wrote:

                

                

                  

                    
On 10/8/16 5:04 PM, Thad Guidry wrote:

                    

                  

                  

                    

                      
Class mappings are
                        almost complete Kingsley. We were trying to get
                        Wikidata to the point where it is easy for folks
                        to do trivial queries right inside WDQS as part
                        of WD Goals for 2016.

                    

                    

                  

                  
 Thad,

                    

                    Here is a post (brought up to date in last day) that
                    demonstrates owl:equivalentClass reasoning and
                    inference. Once I have a link to the new mappings I
                    will integrate into this demo.

                    

                    Note, this particular LOD Cloud Cache instance has
                    30 Billion+ triples against which the
                    owl:equivalentClass inference is being applied, at
                    query evaluation time. 

                    

                    [1] http://kidehen.blogspot.com/2014/02/class-equivalence-based-reasoning.html

                  


                    

                    Kingsley 

                  

                  

                    
 

                      

                        
On Sat, Oct 8,
                          2016, 2:38 PM Kingsley Idehen <kidehen@openlinksw.com>
                          wrote:

                        

                        

                          

                            
On 10/6/16 2:57 PM, Thad Guidry
                              wrote:

                            

                            
Hello
                              team :)
                              


                              

                              
So while I'm
                                helping with the Wikidata - Schema.org
                                mappings, a request came in to expose
                                subcategories of an existing Wikipedia
                                category.

                              


                              

                              
For example, say I
                                start with this topic: https://www.wikidata.org/wiki/Q27119725 
                                Parking facilities

                              


                              

                              
The topic's main
                                category is shown as "Category:Parking
                                facilities" and that has links to
                                Wikipedia, specifically a Wikipedia
                                category link, and where the WP category
                                page has subcategories that I would like
                                to expose somehow in whichever way is easiest
                                currently with our tools, apis, etc.

                              


                              

                              
Can it all be done
                                in SPARQL against some services that
                                already expose WP subcategories given a
                                specific category ?  Or is there an API
                                that does this already ?  other tools
                                that might expose WP categories ?

                              


                              

                              
The IDEAL GOAL is
                                to query 'equivalent class' = schema.org/ParkingFacility
                                and get back the WP categories in one shot or query
                                  or api call.

                              


                              

                              
http://schema.org/ParkingFacility

                              

                                

                                  

                                    
                                    
                                    
                                  

                                

                                


                                

                              

                              
Any gurus ?

                            

                            

                          

                          

                            
Hi Thad,

                            
If there are
                              owl:equivalentClass mappings in some
                              Linked Data Space, and the SPARQL service
                              associated with said Data Space supports
                              owl:equivalentClass reasoning, then the
                              answer to your question is yes.

                            What unknown right now is the class mappings
                            between Wikidata and Schema.org. If a dump
                            of those exist, the rest is trivial :) 

                            
-- 
Regards,

Kingsley Idehen	      
Founder & CEO 
OpenLink Software   (Home Page: http://www.openlinksw.com)

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-- 
Regards,

Kingsley Idehen	      
Founder & CEO 
OpenLink Software   (Home Page: http://www.openlinksw.com)

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-- 
Regards,

Kingsley Idehen	      
Founder & CEO 
OpenLink Software   (Home Page: http://www.openlinksw.com)

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-- 
Regards,

Kingsley Idehen	      
Founder & CEO 
OpenLink Software   (Home Page: http://www.openlinksw.com)

Weblogs (Blogs):
Legacy Blog: http://www.openlinksw.com/blog/~kidehen/
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